Yesterday I finally got OWA publishing through ISA and immediately managed to break it somehow. After restarting ths ISA services I got these errors in the event log 14177 Some certificates cannot be initialized (error code -2146885628). The Web Proxy filter could not initialize. Check that all certificates used by the Web Proxy filter are valid. 14060 Cannot load an application filter Web Proxy Filter ({4CB7513E-220E-4C20-815A-B67BAA295FF4}). FilterInit failed with code 0x80092004. To attempt to activate this application filter again, stop and restart the Firewall service. 14001 Firewall Service failed to initialize. Previous event log entries might help determine the proper action. Eventid.net didn't have anything useful, and the only reference I found at http://forums.isaserver.org/ultimatebb.cgi?ubb=get_topic;f=19;t=000394 had no resolution. I have not done an export or anything. How can I tell which certificates are used by the web proxy filter as the message in 14177 suggests? Jeff